Michael Clemens is a senior fellow at the Center for Global Development, where he studies the economic effects and causes of migration around the world. He has published numerous peer-reviewed articles on migration, development, and impact evaluation, and his research has been awarded the Royal Economic Society Prize. He also serves as a Research Fellow of IZA Institute of Labor Economics in Bonn, Germany, and is an Associate Editor of the Journal of Population Economics and World Development. He is the author of the book The Walls of Nations, forthcoming from Columbia University Press. Previously, Clemens has been an Affiliated Associate Professor of Public Policy at Georgetown University, a visiting scholar at New York University, and a consultant for the World Bank, Bain & Co., the Environmental Defense Fund, and the United Nations Development Program. He has lived and worked in Colombia, Brazil, and Turkey. He received his PhD from the Department of Economics at Harvard University, specializing in economic development, public finance, and economic history.